Ruby: Added methods to acquire a player's games
Ruby: Added methods to acquire a player's games

 * New instance variable @games for SteamId
 * SteamId#fetch_games will load game data of this Steam ID from Steam Community into @games
 * SteamId#games will return @games and fetch first if @games is nil

Arie/steam-condenser-ruby,hcool/steam-condenser-ruby,jpalumickas/steam-condenser-ruby,bfosberry/steam-condenser-ruby,koraktor/steam-condenser-ruby,kickback/steam-condenser-ruby